<?php

class PostController extends Controller
{
    public function accessRules()
	{
		return array(
			array('allow', // allow all users to perform 'list' and 'show' actions
			'actions'=>array('index', 'view'),
			'users'=>array('*'),
			),

			array('allow', // allow authenticated users to perform any action
			'users'=>array('@'),
			),

			array('deny', // deny all users
			'users'=>array('*'),
			),
		);
	}
	
	/**
	 * @var string the default layout for the views. Defaults to '//layouts/column2', meaning
	 * using two-column layout. See 'protected/views/layouts/column2.php'.
	 */
	public $layout='//layouts/column2';

	/**
	 * @return array action filters
	 */
	public function filters()
	{
		return array(
			'accessControl', // perform access control for CRUD operations
			'postOnly + delete', // we only allow deletion via POST request
		);
	}

	/**
	 * Specifies the access control rules.
	 * This method is used by the 'accessControl' filter.
	 * @return array access control rules
	 */

	/**
	 * Displays a particular model.
	 * @param integer $id the ID of the model to be displayed
	 */
	public function actionView()
    {
        $post=$this->loadModel();
        $comment=$this->newComment($post);
        
		$this->render('view',array(
            'model'=>$post,
            'comment'=>$comment,
            ));
    }
	
	protected function newComment($post)
    {
    $comment=new Comment;

	if(isset($_POST['ajax']) && $_POST['ajax']==='comment-form')
    {
        echo CActiveForm::validate($comment);
        Yii::app()->end();
    }
    
	if(isset($_POST['Comment']))
    {
        $comment->attributes=$_POST['Comment'];
        
		if($post->addComment($comment))
        {
            if($comment->status==Comment::STATUS_PENDING)
                Yii::app()->user->setFlash('commentSubmitted','Thank you for your comment. Your comment will be posted');
				$this->refresh();
        }
    }
    return $comment;
    }

	/**
	 * Creates a new model.
	 * If creation is successful, the browser will be redirected to the 'view' page.
	 */
	public function actionCreate()
	{
		$model=new Post;

		// Uncomment the following line if AJAX validation is needed
		// $this->performAjaxValidation($model);

		if(isset($_POST['Post']))
		{
			$model->attributes=$_POST['Post'];
			if($model->save())
				$this->redirect(array('view','id'=>$model->id));
		}

		$this->render('create',array(
			'model'=>$model,
		));
	}

	/**
	 * Updates a particular model.
	 * If update is successful, the browser will be redirected to the 'view' page.
	 * @param integer $id the ID of the model to be updated
	 */
	public function actionUpdate($id)
	{
		$model=$this->loadModel($id);

		// Uncomment the following line if AJAX validation is needed
		// $this->performAjaxValidation($model);

		if(isset($_POST['Post']))
		{
			$model->attributes=$_POST['Post'];
			if($model->save())
				$this->redirect(array('view','id'=>$model->id));
		}

		$this->render('update',array(
			'model'=>$model,
		));
	}

	/**
	 * Deletes a particular model.
	 * If deletion is successful, the browser will be redirected to the 'admin' page.
	 * @param integer $id the ID of the model to be deleted
	 */
	public function actionDelete()
    {
        if(Yii::app()->request->isPostRequest)
        {
        // we only allow deletion via POST request
        $this->loadModel()->delete();
        if(!isset($_GET['ajax']))
            $this->redirect(array('index'));
        }
	
        else
        throw new CHttpException(400,'Invalid request. Please do not repeat this request again.');
    }

	/**
	 * Lists all models.
	 */
	public function actionIndex()
	{
		$criteria=new CDbCriteria(array(
		'condition'=>'status='.Post::STATUS_PUBLISHED,
		'order'=>'update_time DESC',
		'with'=>'commentCount',
		));

		if(isset($_GET['tag']))
			$criteria->addSearchCondition('tags',$_GET['tag']);

		$dataProvider=new CActiveDataProvider('Post', array(
			'pagination'=>array(
				'pageSize'=>5,
			),
			
			'criteria'=>$criteria,
		));
		
		$this->render('index',array(
			'dataProvider'=>$dataProvider,
		));
	}

	/**
	 * Manages all models.
	 */
	public function actionAdmin()
	{
		$model=new Post('search');
		//$model->unsetAttributes();  // clear any default values
		if(isset($_GET['Post']))
			$model->attributes=$_GET['Post'];

		$this->render('admin',array(
			'model'=>$model,
		));
	}

	/**
	 * Returns the data model based on the primary key given in the GET variable.
	 * If the data model is not found, an HTTP exception will be raised.
	 * @param integer $id the ID of the model to be loaded
	 * @return Post the loaded model
	 * @throws CHttpException
	 */
	public function loadModel($id)
	{
		$model=Post::model()->findByPk($id);
		if($model===null)
			throw new CHttpException(404,'The requested page does not exist.');
		return $model;
	}

	/**
	 * Performs the AJAX validation.
	 * @param Post $model the model to be validated
	 */
	protected function performAjaxValidation($model)
	{
		if(isset($_POST['ajax']) && $_POST['ajax']==='post-form')
		{
			echo CActiveForm::validate($model);
			Yii::app()->end();
		}
	}
}
